What is the function of trap flag in 8086 microprocessor?
what is the function of trap flag in 8086 microprocessor?Posted in: #Electronics
Also, The Trap Flag is mainly used for debugging purposes.
Hope it helps!!!
So, here's my two cents:
Trap Flag is used for on-chip debugging. Debuggers can use it for step-by-step execution of a computer program. If 8086 does a type-1 interrupt, Trap Flag is reset. Therefore, the single-step mode will be disabled during the interrupt-service procedure.
will any geek tell me what the hell on earth single step execution means ?
Trap Flags are an important component of microprocessors as they register the outcomes of calculations and actions. Flags are crucial for decision-making in microprocessors.
Trap flag is used in trace mode setting, that is, initiating single stepping mode. After every instruction, the microprocessor is interrupted so as to debug the program.
Trap flag is a control flag. Trap flag is used for chip-debugging. The functions for which this trap flag used are :
- To run instruction at a time for debugging.
- To check whether the memory is available after executtion.
- To jump to the required instruction,causing effective execution of program.
- Makes 8086 micro processor to run in single step mode.
The flag register of 8086 Microprocessor is 16-bit and one bit among 16-bit is used for trap flag.
Trap flag is used for on-chip debugging. When trap flag is set to 1 that puts the microprocessor into single step mode for debugging. In single stepping, the microprocessor executes a instruction and enters into single step Interupt Service Routine(ISR).That is if the trap flag is set, the CPU automatically generates an internal interrupt after each instruction, allowing a program to be inspected as it executes instruction by instruction. And when trap flag is reset, no function is performed.
This flag is used of we need single-step debugging in our code. If the Trap flag is set, then the execution will be done step by step. Otherwise, the free-running operation will be done.